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| 型号： | IR2167S |
| 厂商： | International Rectifier |
| 元件分类： | 基准电压源/电流源 |
| 英文描述： | PFC Ballast Control. Thermal Overload Protection. Brown Out Protection. Programmable Preheat and Frequency. Programmable Deadtime in a 20 Lead SOIC package |
| 中文描述： | PFC的镇流器控制。热过载保护。欠压保护。可编程预热和频率。可编程死区时间在20引脚SOIC封装 |
| 文件页数： | 15/30页 |
| 文件大小： | 937K |
| 代理商： | IR2167S |
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IR2167(
S
)
www.irf.com
15
Functional Description
Under-voltage Lock-Out Mode (UVLO)
The under-voltage lock-out mode is defined as the state the
IC is in when VCC is below the turn-on threshold of the IC.
(To identify the different modes of the IC, refer to the State
Diagram shown on page 2 of this document). During under-
voltage lock-out mode, the HO, LO and PFC driver outputs
are low and the CT pin is connected to COM through resis-
tor RDT
to disable the oscillator. Also, the internal supply to
the RT pin circuitry is shut off and pins CPH, RUN, DT and
COMP are internally pulled to COM. The IR2167 under-
voltage lock-out mode is designed to maintain a very low
supply current of less than 200
μ
A, and to guarantee the IC
is fully functional before the high side, low side and PFC
drivers are activated. Figure 1 shows an efficient supply
using the start-up current of the IR2167 together with a charge
pump from the ballast stage (RSUPPLY, CVCC, DCP1 and
DCP2).
Figure 1: Start-up and supply circuitry
The V
CC
capacitor (CVCC) is charged by current through
supply resistor (RSUPPLY) minus the start-up current drawn
1
2
3
4
5
6
7
8
20
19
18
17
16
15
14
13
I
VDC
CPH
RPH
RT
RUN
CT
DT
OC
LO
COM
VCC
VB
VS
HO
SD
CS
11
12
10
9
COMP
ZX
PFC
VBUS
+ V
BUS
+ rectified AC Line
V
BUS
return
C
BS
D
BS
C
VCC
R
CS
R3
R4
C
SNUBBER
R
Supply
D
CP2
D
CP1
R2
C1
R1
Half-bridge
output
by the IC. The value of (RSUPPLY) is chosen to provide 2X
the maximum start-up current to guarantee ballast start-up
at low line input voltage. Once the capacitor voltage on the
VCC pin reaches the start-up threshold, the SD lead is be-
low 5.1 volts and VVDC is greater than 5.1V, the IC turns on
and LO and HO begin to oscillate. PFC does not begin to
oscillate until the IC reaches Preheat Mode.
Preheat Mode Startup Mode
The IR2167 enters Preheat mode when VCC exceeds
the UVLO positive-going threshold. Before Preheat mode
begins, the CPH and RPH pins are connected to COM. (See
Figure 3). As Preheat begins, the external capacitor CPH is
charged up by an internal 3
μ
A current source. CPH
determines the preheat time which continues until the voltage
on the CPH pin charges to 4.0V. Preheat mode is defined as
the state the IC is in when the lamp filaments are being heated
to their correct emission temperature. This is necessary for
maximizing lamp life and reducing the required ignition
voltage. At the onset of Preheat Mode, C
VCC
begins to
discharge due to the increase in IC operating current (Figure
2) above the available current through resistor R
SUPPLY
.
However, the half-bridge output also begins to oscillate and
the charge pump,
consisting
of
C
SNUBBER
, D
CP1
and D
CP2
,
supply the current to charge capacitor C
VCC
and thus the
voltage to the IC. The VCC voltage supplied to the IC is
limited by the internal 15.6V zener clamp. CVCC and
C
SNUBBER
must be selected such that enough supply current
DISCHARGE
TIME
INTERNAL VCC
ZENER CLAMP VOLTAGE
VHYST
V
UVLO+
V
UVLO-
CHARGE PUMP
OUTPUT
t
V
C1
R
& C
VCC
TIME
CONSTANT
C
DISCHARGE
Figure 2: Supply Capacitor (CVCC) voltage
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相关代理商/技术参数 |
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|---|---|
| IR2167SPBF | 功能描述:IC CTLR BALLAST PFC 20-SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 照明，镇流器控制器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 类型:CCFL 控制器 频率:40 ~ 80 kHz 电流 - 电源:5mA 电流 - 输出:- 电源电压:4.5 V ~ 5.5 V 工作温度:-40°C ~ 85°C 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC 包装:带卷 (TR) 其它名称:90-3991V+V01 |
| IR2167STRPBF | 功能描述:功率因数校正 IC PFC Ballast Control, Thermal Overload Protection, RoHS:否 制造商:Fairchild Semiconductor 开关频率:300 KHz 最大功率耗散: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
| IR2170 | 功能描述:IC CURRENT SENSE 600V 1MA 8-DIP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳流/电流管理 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 功能:电流开关 检测方法:- 精确度:±10% 输入电压:1.7 V ~ 5.5 V 电流 - 输出:600mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-UFQFN 供应商设备封装:10-UTQFN（1.4x1.8） 包装:管件 |
| IR2170S | 功能描述:IC CURRENT SENSE 600V 1MA 8-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 稳流/电流管理 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 功能:电流开关 检测方法:- 精确度:±10% 输入电压:1.7 V ~ 5.5 V 电流 - 输出:600mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-UFQFN 供应商设备封装:10-UTQFN（1.4x1.8） 包装:管件 |
| IR2171 | 制造商:IRF 制造商全称:International Rectifier 功能描述:LINEAR CURRENT SENSING IC |
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